I have been studying your charts, thank you for providing them. According to them at .0003 to .0005 seconds the ejecta, has not only started to move, it has traveled about an inch. At that point it has overcome the crimp, and has ENTERED THE FORCING CONE. There is no gap in time or space for that process to complete itself.
I have read through the links you have kindly provided, frankly they are not relevant. While they discuss patterning, felt recoil, barrel safety, etc. While interesting, they do not discuss pressure changes do to the modifications.
So to summarize your position if I might. Crimps and forcing cones have zero affect on the pressure of a fired load. And the peak pressure in a muzzleloader will be identical to that of the breechloader when they fire a similar load. Do I have that correct?
